F11 vs Z79
F11 (Opioid related disorders) compared with Z79 (Long term (current) drug therapy), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. Z79 carries an Excludes2 note covering F11: “drug abuse and dependence (F11-F19)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| F11Opioid related disorders | Z79Long term (current) drug therapy | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Opioid related disorders is a non-billable ICD-10-CM category code (F11). | Long term (current) drug therapy is a non-billable ICD-10-CM category code (Z79). |
| Includes | — | long term (current) drug use for prophylactic purposes |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources